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dc.contributor.authorHarada, A
dc.contributor.authorNakamura, Keisuke
dc.contributor.authorKanno, Taro
dc.contributor.authorInagaki, R.
dc.contributor.authorØrtengren, Ulf Thore
dc.contributor.authorNiwano, Y.
dc.contributor.authorSasaki, Keiichi
dc.contributor.authorEgusa, Hiroshi
dc.date.accessioned2016-03-17T09:21:07Z
dc.date.available2016-03-17T09:21:07Z
dc.date.issued2015-02-16
dc.description.abstractThe aim of this study was to investigate whether different fabrication processes, such as the computer-aided design/computer-aided manufacturing (CAD/CAM) system or the manual build-up technique, affect the fracture resistance of composite resin-based crowns. Lava Ultimate (LU), Estenia C&B (EC&B), and lithium disilicate glass-ceramic IPS e.max press (EMP) were used. Four types of molar crowns were fabricated: CAD/CAM-generated composite resin-based crowns (LU crowns); manually built-up monolayer composite resin-based crowns (EC&B-monolayer crowns); manually built-up layered composite resin-based crowns (EC&B-layered crowns); and EMP crowns. Each type of crown was cemented to dies and the fracture resistance was tested. EC&B-layered crowns showed significantly lower fracture resistance compared with LU and EMP crowns, although there was no significant difference in flexural strength or fracture toughness between LU and EC&B materials. Micro-computed tomography and fractographic analysis showed that decreased strength probably resulted from internal voids in the EC&B-layered crowns introduced by the layering process. There was no significant difference in fracture resistance among LU, EC&B-monolayer, and EMP crowns. Both types of composite resin-based crowns showed fracture loads of >2000 N, which is higher than the molar bite force. Therefore, CAD/CAM-generated crowns, without internal defects, may be applied to molar regions with sufficient fracture resistance.en_US
dc.descriptionAccepted manuscript version.Published version available at <a href=http://doi.org/10.1111/eos.12173>http://doi.org/10.1111/eos.12173</a>en_US
dc.identifier.citationEuropean Journal of Oral Sciences, Volume 123, Issue 2, pages 122–129, April 2015en_US
dc.identifier.cristinIDFRIDAID 1238920
dc.identifier.doi10.1111/eos.12173
dc.identifier.issn0909-8836
dc.identifier.urihttps://hdl.handle.net/10037/8995
dc.identifier.urnURN:NBN:no-uit_munin_8559
dc.language.isoengen_US
dc.publisherWileyen_US
dc.rights.accessRightsopenAccess
dc.subjectVDP::Medical disciplines: 700::Clinical dentistry disciplines: 830en_US
dc.subjectVDP::Medisinske Fag: 700::Klinisk odontologiske fag: 830en_US
dc.subjectcomposite resinen_US
dc.subjectCAD/CAMen_US
dc.subjectlithium disilicateen_US
dc.subjectmicro-CTen_US
dc.subjectfracture resistanceen_US
dc.titleFracture resistance of computer-aided design/computer-aided manufacturing-generated composite resin-based molar crownsen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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